Your requirements could not be resolved to an installable set of packages. Problem 1 - Root composer.json requires phpunit/phpunit 11.0.3 -> satisfiable by phpunit/phpunit[11.0.3]. - phpunit/phpunit 11.0.3 requires php >=8.2 -> your php version (7.4.33) does not satisfy that requirement. Problem 2 - orchestra/testbench[v6.0.0, ..., v6.9.0] require phpunit/phpunit ^8.4 || ^9.0 -> found phpunit/phpunit[8.4.0, ..., 8.5.x-dev, 9.0.0, ..., 9.6.x-dev] but it conflicts with your root composer.json require (11.0.3). - orchestra/testbench[v6.10.0, ..., v6.12.1] require phpunit/phpunit ^8.4 || ^9.3 -> found phpunit/phpunit[8.4.0, ..., 8.5.x-dev, 9.3.0, ..., 9.6.x-dev] but it conflicts with your root composer.json require (11.0.3). - orchestra/testbench[v6.13.0, ..., v6.21.1] require phpunit/phpunit ^8.4 || ^9.3.3 -> found phpunit/phpunit[8.4.0, ..., 8.5.x-dev, 9.3.3, ..., 9.6.x-dev] but it conflicts with your root composer.json require (11.0.3). - orchestra/testbench[v6.22.0, ..., 6.x-dev] require phpunit/phpunit ^8.5.21 || ^9.5.10 -> found phpunit/phpunit[8.5.21, ..., 8.5.x-dev, 9.5.10, ..., 9.6.x-dev] but it conflicts with your root composer.json require (11.0.3). - Root composer.json requires orchestra/testbench 6.* -> satisfiable by orchestra/testbench[v6.0.0, ..., 6.x-dev].